<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form th:action="@{/brand/doUpdate}">
    ID:<input class="form-control" type="text" placeholder="Readonly input here…" readonly th:value="${brands.id}"/><br/>
    Name:<input type="text" name="name" th:value="${brands.name}"/><br/>
   remark: <textarea name="remark" rows="4" cols="20" th:text="${brands.remark}"></textarea><br>
    <button type="submit">Save</button>
</form>

</body>
</html>